621.928.622.279 Recently, there have been attempts to explore and utilize low-yield deposits of natural gas which can play an important role in gasification of regions far away from main transmission gas lines.To prepare natural gas in such deposits, the Central Design Bureau Holding Company developed low-temperature separation (LTS) equipment for use in low-yield deposits with a productivity with respect to gas of 40,000 to 150,000 m3/day at a liquid content in the gas of up to 200 cm3/m 3. Equipment ( Fig. 1) consists of units required for preparing the gas by the method of low-temperature separation and includes the step I separator, the gas-gas heat exchanger, the step II separator, the divider, the ejector, regulation, closing, and safety fittings, and impeetion and monitoring devices.Taking into account the low productivity, the LTS equipment is assembled in the form of a single transport unit weighing 11.3 t, 9 m long, 2.4 m wide, and 2.8 m tall.Equipment consists of three main parts: stage I separation section, divides the section, and the stage II separation section.The stage I separation section (stage I separator) consists of a horizontal liquid collector with an internal diameter of 600 mm which contains an elliptical end on one side and a flange on the other side, and a head part 300 mm in diameter in which a mesh baffle of three centrifugal elements are placed for cleaning the gas.The dividing section (divider P-l) has the form of a coil whose two ends have flanges; inside the coil there is a moveable and changeable packed layer which uses inclined sheets to intensify the process of separation of the mixture (hydrocarbon condensate and methanol water) into components.The stage II separation section (stage II separator) consists of two horizontal containers: a liquid collector with an internal diameter 600 ram made in the same manner as the collector of the stage I separation section, and a separator with an outer diameter of 219 mm in which one centrifugal element is placed along the path of the gas flow.Using flanges separated by flat barriers, all sections are connected into a single apparatus. The barriers are designed for the total gas pressure gradient between the zones.The gas-gas heat exchanger is a horizontal apparatus with an outer diameter 325 mm with a U-shaped bundle of pipes 25 • 2 mm in diameter and 4 mm long. A special feature of this apparatus is that the "hot n flow is supplied at the bottom, and the "cold" flow at the top.A crude gas with a temperature of 4"C is supplied under a pressure of 7.9 MPa into the stage I separator where the drip liquid is separated from it and is then directed through the dispersion and methanol supply section into the gas-gas exchanger for cooling. The cooled gas travels through the regulating valve into the ejector and then travels to the stage II separator under a pressure of 5.7 MPa at a temperature of -25~Passing through the centrifugal element, the gas is directed into the space between the pipes in the heat exchanger where it is heated up and ...
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